APIFor developers at ecommerce brands, marketplaces and 3PLs

A shipping API for sellers.

Rates, labels with customs docs, tracking and webhooks, and address validation, as plain REST endpoints. Build UPS, FedEx, USPS, and DHL shipping into your store, marketplace tooling, or warehouse system.

Get an API key API reference ↗

covers: Rates · Labels · Tracking · Addresses
carriers: UPS · FedEx · USPS · DHL
style: REST + JSON, webhooks

POST/rates

// example request: compare rates, then buy a label
const rates = await ex.rates.create({
  from:   { country: 'ES', city: 'Barcelona' },
  to:     { country: 'US', city: 'Atlanta', state: 'GA' },
  parcel: { weight_oz: 8, length_in: 10, width_in: 8, height_in: 3 },
})

// buy the cheapest one, customs docs included
const label = await ex.labels.create({ rate: rates[0].id })

200rates from your carriers, cheapest firstexample request · exact fields in the API reference

how it fits

Your system on one side, the carriers on the other.

Your code talks to one API. ExperShip handles each carrier, returns rates and labels, and pushes tracking updates back to you as shipments move.

WHERE THE API SITSschematic

what you can build

Four building blocks for shipping in code.

The same features as the ExperShip web app, available through the API. Use one, or wire up the whole flow from order to doorstep.

rates

Multi-carrier rates

Send an origin, a destination, and a parcel. Get back live rates from the carriers on your account, cheapest first, so your code or your checkout can pick the right service.

Compare UPS, FedEx, USPS, and DHL in one call
Domestic U.S. and cross-border into the U.S.
Pick by price, delivery time, or your own rules

RATES Shopify #7323 → Philadelphiaexample response

#	Carrier	Service	Note
0	FedEx	Home Delivery	cheapest on-time
1	USPS	Ground Advantage	compared
2	UPS	Ground	compared
3	USPS	Priority Mail	compared

rates[0] is the one your rules picked

labels

Labels, with customs docs for cross-border

Turn the rate you picked into a printable label. For parcels crossing into the U.S., the customs documents come back in the same step, so nothing is filled in by hand.

One label, or many in a batch
Customs paperwork alongside the label
The same call for every carrier

Amazon order · Barcelona → Atlantaexample request

// rates came back cheapest first; buy rates[0]
const label = await ex.labels.create({ rate: rates[0].id })

// cross-border parcel: label + customs form
// UPS Worldwide Expedited · Barcelona, Spain → Atlanta, GA

200label ready to print, customs docs included

tracking & webhooks

Tracking and webhooks

Every shipment you create can be tracked. Ask for its status any time, or register a webhook and let status updates come to you, in order, as the parcel moves.

Status updates pushed to your system
Keep your order records current automatically
Use them to notify buyers your own way

How webhooks work →

SHIPMENT Shopify #7323 · FedEx Home Deliveryexample

status: In transit
carrier: FedEx
destination: Philadelphia, PA
buyer: notified

address validation

Address validation

Check an address before you buy a label. Catching a typo at checkout or in your warehouse is cheaper than a returned parcel or a carrier correction later.

Validate at checkout or before printing
Get a corrected address back where possible
Stop bad addresses before they ship

ADDRESS CHECKexample

as entered

1200 main st
philadelphia pa

validated

1200 Main St
Philadelphia, PA 19103

deliverable · ready to label

api reference

Endpoints at a glance.

A plain-English map of what the API covers. Exact paths, fields, and responses are in the full API reference.

ENDPOINTS by areaillustrative · not the spec

Area	You send	You get back	Example
Rates	Origin, destination, and parcel size and weight	Rates from your connected carriers, cheapest first	POST /rates
Labels	The rate you picked	A printable label, plus customs documents for cross-border parcels	ex.labels.create(...)
Tracking	A shipment you created	Its current status and history	see reference
Webhooks	A URL on your side	Status updates pushed to it as each shipment moves	see reference
Address validation	An address	Whether it is deliverable, with a corrected version where possible	see reference

Want the full reference? Get an API key, or ask us for access.Get an API key →Talk to us →

webhooks

Status updates come to you.

Instead of polling each carrier, give ExperShip a URL. As a shipment moves, its status updates are pushed to that URL in order, so your order records, dashboards, and buyer emails stay current.

Register an endpoint
A URL on your server that accepts JSON.
Receive updates in order
Each shipment's status changes arrive in the order they happened.
Update your system
Write the status to the order, trigger a buyer email, or flag a problem for your team.

STATUS UPDATES Shopify #7323example shipment

01
Label createdFedEx Home Delivery
02
Picked up by carrierfirst carrier scan
03
In transitmoving through the network
04
Out for deliveryPhiladelphia, PA
05
Deliveredfinal status

plain-English labels · exact status names are in the API reference

your webhook handlerexample sketch

// your server: receive a status update, save it
app.post('/shipping-updates', async (req, res) => {
  const update = req.body
  await saveShipmentStatus(update)  // your code
  res.sendStatus(200)
})

guides

Guides for shipping in code.

Practical guides on shipping APIs, carriers, and customs, written for the people building ecommerce systems.

Start here

All articles →

Build shipping into your stack.

Get an API key and start with rates and labels. Planning a bigger integration, or shipping cross-border into the U.S.? Talk to us first.

Get an API key Talk to us